초록 ▼

A burner assembly having improved flame length and shape control is presented, which includes in exemplary embodiments at least one fuel fluid inlet and at least one oxidant fluid inlet, means for transporting the fuel fluid from the fuel inlet to a plurality of fuel outlets, the fuel fluid leaving

A burner assembly having improved flame length and shape control is presented, which includes in exemplary embodiments at least one fuel fluid inlet and at least one oxidant fluid inlet, means for transporting the fuel fluid from the fuel inlet to a plurality of fuel outlets, the fuel fluid leaving the fuel outlets in fuel streams that are injected into a combustion chamber, means for transporting the oxidant fluid from the oxidant inlets to at least one oxidant outlet, the oxidant fluid leaving the oxidant outlets in oxidant fluid streams that are injected into the combustion chamber, with the fuel and oxidant outlets being physically separated, and geometrically arranged in order to impart to the fuel fluid streams and the oxidant fluid streams angles and velocities that allow combustion of the fuel fluid with the oxidant in a stable, wide, and luminous flame. Alternatively, injectors may be used alone or with the refractory block to inject oxidant and fuel gases. The burner assembly affords improved control over flame size and shape and may be adjusted for use with a particular furnace as required.

대표청구항 ▼

[ What is claimed is:] [1.] A method of combustion in a combustion chamber of a furnace a fuel with oxygen the oxygen contained in an oxidant gas, the combustion generating heat to raise the temperature of a load or the furnace itself the fuel and oxidant gas delivered to the combustion chamber by a

[ What is claimed is:] [1.] A method of combustion in a combustion chamber of a furnace a fuel with oxygen the oxygen contained in an oxidant gas, the combustion generating heat to raise the temperature of a load or the furnace itself the fuel and oxidant gas delivered to the combustion chamber by a burner apparatus, the burner apparatus comprising a burner block having cavity means including at least two fuel injectors for distributing the fuel in at least two fuel streams injected in the combustion chamber of the furnace, and at least one main oxidant cavity ending with an elongated orifice having a major axis along its largest dimension which is generally parallel to a surface of the load or furnace to be heated, the elongated orifice suitable for injecting a major portion of oxidant required for complete combustion of the fuel, wherein the elongated orifice directs the major portion of oxidant to converge toward the at least two fuel streams and toward the surface of the load or furnace to be heated in order to generate a broad flame substantially parallel to the surface to be heated, wherein the inner geometry of the main oxidant cavity comprises preferably four sections: a first section which is generally cylindrical and having an axis; a second section which is generally cylindrical, of the same diameter as the first section; the second section making an angle (B) with the axis of the first section; continuously attached to the second section is a third section, generally conical with diverging angles (C) ranging from about 10.degree. to about 120.degree.; and a fourth section connecting continuously the third section with the main elongated orifice, the method comprising injecting the fuel into the combustion chamber through said at least two fuel injectors and injecting said major portion of oxidant through said at least one main oxidant cavity into the combustion chamber and injecting a secondary oxidant around each of the at least two fuel injectors in order to increase flame luminosity by initiating combustion of the fuel before the major portion of oxidant intersects the at least two fuel streams in the combustion chamber, creating a fuel rich mixture between the load or furnace being heated and the major portion of oxidant;a) the amount of secondary oxidant providing from 0 to about 20% of the oxygen required for complete combustion of the fuel wherein said broad flame emanates as a single flame from the burner block; orb) the amount of secondary oxidant providing from about 20% to about 50% of the oxygen required for complete combustion of the fuel, wherein said broad flame emanates from the burner block as two or more separate flames.